Agilent Technologies N9340A Resolving Small Signals Hidden by Large Signals, Making Measurements

3 Making Measurements

Resolving Small Signals

Hidden by Large Signals

This example uses narrow resolution bandwidths to resolve two input signals with a frequency separation of 50 kHz and an amplitude difference of 60 dB.

1Connect two sources to the analyzer input connector as shown in Figure 3 on page 28.

2Set one source to 300 MHz at –10 dBm. Set the other source to 300.05 MHz at –70 dBm.

3Set the analyzer as follows:

•Press [PRESET]

•Press [FREQ] > {Center Freq} > 300.05 > {MHz}

•Press [SPAN] > [500] > kHz.

•Press [BW/SWP] > {RBW} > 300 > {Hz}

4Reduce the resolution bandwidth filter to view the smaller hidden signal. Place a delta marker on the smaller signal:

•Press [MARKER] > {Peak Search}

•Press [MARKER] > {Delta}

•Press [MARKER] > {Peak Search} > {Next Right PK} or {Next Left PK}.

Figure 5 Resolving small signal hidden by a large signal

30 N9340A User’s Guide